Perhaps you should try some spelling variations:
"using java java snippets" » "using data java snippets", "using java java slippers"
"han viet java snippets" » "han viet va snippets", "san viet java snippets", "van viet java snippets", "dan viet java snippets", "han viet java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("han viet java snippets") or ("using java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("han viet java snippets") OR ("using java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( han viet java snippets ) or ( using java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("han viet java snippets") or ("using java java snippets"))) or ("locating bug code snippets"))*.